Hemmer for sewing machines



Jan. 80, 1923.

A. H. DE VOE.

HEMMER FOR SEWING MAQHINES.

FILED JULY27| i918.

ATTORNEY Patented Jan. 30, 1923.

UNETEE STATES rarest series.

ALBERT H. DE VOE, OF WESTFIELD, NEW JERSEY, ASSIGNOR TO THE SINGER MANU- FACTURING COMPANY, A CORPORATION OF NEW JERSEY.

HEMMER FDR SEWING MACHINES.

Application filed July 27, 1918. Serial No. 246,986.

To all whom it may concern.

Be it known that I, ALBERT H. DE Von, a citizen of the United States, residing at Westfield, in the county of Union and State of New Jersey, have invented certainnew and useful Improvements in Hemmers for Sewing Machines, of which the following is a specification, reference being had therein to the accompanying drawings.

sewing machines commonly known as hemmers. It is an improvement upon the con-' struction of hemmer shown in my copending application Serial No. 7 97,946, filed October 29, 1913.

It aims to provide simple and inexpensive means for displacing from across the line oi seam formation an arbor which would otherwise obstruct the closing or complete stitching of endless hems. It also aims to insure uniformity in the distance the stitches are laid from the inner edge or the edge told of a hem throughout the formation of an endless seam. It aims still further to provide conveniently operable and simple devices permitting a hemmer to be thrown out of operation.

The hemmer of the present invention comprises in its preferred embodiment, scroll so and arbor sections the former of which is stationary relative to the line of scam formation and is provided with an upwardly directed lip for guiding the inner edge or edgetold of the hem immediately before it reaches the needle, and the latter (arbor) of which is fixed to one end of a lever fulcrumed on a horizontal axis below the cloth-plate about which axis it may be swung to remove it from an obstructing position, in the line of scam formation in order to complete the stitching of endless hemswithout stopping the machine. The hemmer is secured to an apron which covers and conceals the stitchforming mechanism beneath the cloth-plate and the apron, which is hinged to the bedplate, is moved about ahorizontal axis away from the cloth-plate to throw the hemmer out oi operation. thus making the machine more convenient for straightaway stitching.

The invention is illustrated in tho accompanying drawings in which Fig. 1 is a plan view of the hemmer applied to the end of the work-plate of a sewing machine. Fig. 2 is a front elevation of the same. Fig. 3 is a side elevation ofthe same. Fig. 4 is a per This invention relates to attachments for spective of the arbor section of the hemmer. Fig. 5 is a cross section of the scroll section of the hemmer on line A-'B, Fig. 1, showing in front elevation a lip thereon. F i 6 is also a cross-section on the line A--B, Fig. 1, through both sections of the hemmer with a piece of work in the condition it assumes in its passage through the llGIIlD'lBl...

In the drawings the invention is shown applied to a machine of the chain-stitch type in which the needle 1 cooperates with a looper 1 supported and actuated beneath the cloth-plate 2 which is provided with slots 3 for a feed-dog 4iand'with an elongated opening 5 for the needle. The looper-operating mechanism may be of any suitable type such as thatfshown in my Patent No. 1,385,047, dated March 30, 1920. The cloth-plate 2 is cut away as indicated at 6 toreceive the upper-ll anged portion 7 of an apron 8 which is secured by the screws 9 to an arm-10 on one end of a pin 11 fitted within a sleeve 12 which is journaled in a boss l3 integral with the bed-plate 14. of the machine. The sleeve 12 has a collar 15 integral therewith through. which is threaded a screw 16 clamping the pin 11 fast to the sleeve andconfining the apron 8 against lateralmovement in either direction. In a recess 17 provided in the collar 15 the end of a pin 18 is'adapted to seat, under the propulsion of a spring 19 socketed in an adjustment screw 20, when the apron 8 occupies the position shown in Fig.

3, covei-lng and protecting the loope'r and feeding mechanism'beneath the cloth-plate of the machine.

To the flanged portion 7 of'the apron is adjustably secured by the screw and slot connection indicated at 21, an angular plate having a horizontal portion 22 and vertical portion 23, the latter of which depends in frontnfa portion of the apron 8. To the angular plate 22-23 the scroll section 24:

fbf the h'enimer is soldered or otherwise suit- An edge-guide 26 is.

livery end of the concave wall 27 of the scroll section oi the hemmer.

The arbor section 28 ot the hennncr is of the shape and form shown in the drawings and intertits with the scroll section lo define a channel for folding: the material into a hem. The edges of the scroll and arbor sections meet so as not. to break the continuity of the worloguiding channel, their line of cleavage being indicated at 29. The arbor section 28 is secured to one end of a lever 30 which is t'ulcrumed intermediate its ends on a screw 31 threaded into the vertical portion 23 of the angular plate, a spring washer being interposed between the head of the screw 31 and the lever to t'rictionally retain it in any position into which the lever may be displaced by manual manipulation of its handle or operating end To retain the arbor-section "28 in its normal hemming position, shown in Figs. 1, 2 and 3, a resilient arm 34 is secured at 35 to the angular plate il223 with a pin 36 on its free end disengageably seated in a co pondingly shaped recess in the lever 30 llith the described construction the open ator may move the arbor section of the hour nier to the dotted line position shown in Fig. 2 and then conveniently position the worl: within the scroll. section ot the hemnier after which the arbor section is easilv moved to the position shown in solid lil s in Fig. 52. ll the work be endless (circular or tulnilar) in character, the machine may started and operated continuously until the initial stitches approach the receivingend of the hammer. At this time the op erator by lifting the end ot the lever supporting the arbor section may move the arbor from its obstructing position within the hem and in the line of seam formation to a non-obstructing position to one side thereof, thus allowing the complete stitch-- ing of an endless hem without stoppingthe stitylntorminp; mechanism. It it is not desiredL to use the hemmer the operator may pull. the apron 8 down upon its hinged con nection with the bed-plate of the machine.

Having thus set forth the nature of the invention, what I claim herein combination with a sewing a needle and cloth-plate, separable scroll and arbor rmer of which embraces the latter and 1 therewith a channel for to i un der the mars n of 1112 a cruined below the cloth-plate and supporting said arbor section, said arbor section being arrai'iged in itront of the needle across the line oi scam formation.

In combination with a sewing machine having stitch-forming mechanism including a needle and cloth-plate, a hemmer ha ing a scr ll. s ion pi o d lo he nae-9,702

cloth-plate for movement about an axis transverse the line of feed, an arbor section also pivoted below the cloth-plate for move went into and out of cooperative relation with the scroll section and movable about an axis parallel to the line of feed.

3. In COll'llJllltltlOIl with a sewing machine having stitclrforming mechanism including a needle and cloth-plate. a hemmer having a scroll section pivoted below the cloth plate, an arbor section pivoted also below the clothplate and to said scroll section, said pivots beingtransverse to one another.

et. In combination with a sewing machine having stitch-forming mechanism including a needle and cloth-plate, a hemmer having a scroll-section pivoted below the clothplate, an arbor-section also pivoted below the cloth-plate, said pivots being transverse to one another.

5. In combination with a sewing machine having stitch-forming mechanism including a needle and a cloth-plate, a hammer having separable scroll and arbor sections the former of which partly embraces the latter to define a channel for folding under the margins of material, a lever supporting said arbor section and i'ulcrumed below the clot-hplate for permitting manual shittii'ig of said arbor section away from the scroll section to allow complete stitching of endless circular hems without stopping the operation of the stitch-it'orming' mechanism, a nd means for holding said'arbor section in cooperative relation with said scroll section.

6. In combination with a sewing machine having; stitch-forming mechanism including a needle and cloth-plate, a hammer having" scparable scroll and arbor sections the former of which partly embraces the latter to define a hem forming channel, a lever supporting said arbor section and tulcrumed ii'itermediate its ends, below the cloth-plate, one end of said lever being free and conveniently accessible for manual manipulation to shift the arbor section relative to the scroll section.

7. In combination with a sewing machine having upper and lower stitch-forminef mechanism, a cloth-plate below wnich is lo cated the lower s l'.-torn1ing mechanism. 5 pivotally connected scroll i s 0.. ion an apron supporting the ctions and covei-i e lower stitch foriumechanism, a pi ot r said apron below 7 ainil means for holding the a1"; .11 raised in covering position with the hennner in substantially the plane of the clotlnplate.

8. ln con'ibination with a sewing machine having upper and lower stitch-forming mechanism, a cloth-plate below which is located the lower stitch-forming mecha nism, a hemmer having pivotally connected scroll and arbor sections, an apron supporting the sections and Covering the lower stitch-forming mechanism, a pivot for said apron below said cl0thplate, and yielding means for holding the apron raised in covering position and the hemmer in substantially the plane of the cloth-plate.

9. In combination with a sewing machine having stitch-forming mechanism and a cloth-plate, a hemmer having a relatively fixed scroll section provided at one side thereof with an upwardly directed lip Q-djll'. cent the line of seam formation, an arbor sect-ion in normal position partly embraced by the scroll section and located across the line of seam formation in rear of the lip on the relatively fixed scroll section, and a lever supporting said arbor section and 'tulcrumed beneath the cloth-plate.

10. In combination with a sewing machine having stitch-forming mechanism and a cloth-plate, a hemmer having a relatively fixed scroll section provided at one side thereof with an upwardly directed lip adjacent the line of seam formation, an arbor section in normal position partly embraced by the scroll section andlocated across the line of seam formation in front of the lip on the relatively fixed scroll section, a lever supporting said arbor section and iulerumed beneath the cloth-plate, and a hinged support for said fulcrum, the axis ot the supports hinge being arranged transverse the axis of the levers fulcrum.

11. In combination with a sewing 'machine having stitch-forming mechanism and a cloth-plate, a hemmer having relatively movable scroll and arbor sections the former of which has :a concave fold-guiding wall, an angular supporting plate for said sections with substantially horizontally and vertically disposed portions, an edge gufde on said angular plate to one side of the line of seam formation and forming substantially a continuationoi the concave toldguiding wall of the scroll. section, lip on the scroll section defining with the edge guide a permanent channel for guiding a hem to the stitch-forming mechanism, a lever carrying said arbor section fulcrumed to the vertical portion of said angular supporting plate, an apron covering part 01 the stitch-l mming mechanism beneath the clothpla-te, said angular plate being secured to aid apron, means supporting said apron nd permitting it to be shifted away from .he cloth-plate and permitting the hemmer mail rive position, and a detent cooperating with said lever to hold the arbor section in cooperative relation with the scroll section.

12. An under hemmer attachment for sewing machines having, stationary and movable hem forming sections one of which sustaining one of the sections plate, an apron arried thereby to be thrown out of operais pivoted to the other, an arm for moving the pivoted section, and a spring detent carried by the. stationary section for engaging the arm to restrain accidental displacement of the pivotal section when it is in'normal hemming position, the axis of the pivoted connection between the sections being horizontal and matron.

parallel to the line of seam-fen 13. In a sewing machine having stitchforming mechanism including a needle and a cloth-plate, separable scroll and arbor sections, a member movably supporting the arbor section, a member supporting said scroll section, a pivot between said members whose axis is parallel to the line oi seam formation, and a hinged support for one of said members, the axis of the hinge being arranged transverse the axis of the pivot between the members supporting the sections of the hemmer. Y

i 14. In combination with a sewing machine having stitch-iorming mechanism including a needle and cloth-plate, a hemmer having a scroll-section and an arbor-section,

one of said sections being pivoted below the cloth plate and movable about an axis ex-- apron pivotally mounted on the machine, a

hemmer having scroll and arbor secti'ons,a plate adjust-ably secured to theapron and sustainin the scroll andarbor sections in o D operative position with the stitch-forming mechanis 17. In combination with a sewing machine,an apron pivoted to the machine, a hemmer comprising scroll and tions, a plate adjustable on the apron and and pivot means for sustaining the other section on the plate;

18: In sewin chine having clothbelow the cloth-plate, a hermner col -p gscroll and arbor sections, means for ac ustably sustaining one of said sections on the apron and pivot means for sustaining the other section on the first said means.-

In testimony whereof, I have signed my name to this specification.

ALBERT H. e vos.

arbor sec- 

